Last September 09' I brewed an Imperial Black Saison. Spiced with Meadowsweet, Chamomile, and Nutmeg. Aged on French Oak for two months, called Saison d'Hiver. At 10% it's a big beer and has gotten better with age. One complaint I have with the first batch is head retention. I'll be making some changes to grist bill to aid in head retention. I believe the problem is in the use of spices (oils) and the high alcohol content doesn't help either. Another shortcoming is because of the high alcohol and low finishing gravity, thin body. Other tweaks to recipe are to give more body to the brew. Making it a true, Winter Warmer, of sorts.
Grist bill: Pale malt, Flaked Oats, Chocolate Malt, Black Patent malt, Biscuit Malt, Crystal Malt, and Coffee Malt. Maxing out my mash tun with twenty five total pounds of grain. Hopped lightly with Vanguard. Spiced with Meadowsweet, Chamomile, and Heather (no nutmeg in house).